Yellow dye and process of making same.



matter possesses PAUL JULIUS AND ERNST FUBBINIGGIB, OI LUDWIGSHAFEN-ON-TliE-RHINE, GER

MANY, 810N038 TO BADIBOHI Lmnr & THE-BHINE, GERMANY, A. CORPORATION.

BODA FABBIK, OP LUDWIGBHAFEILON- YELLOW DYE AND P300185 01" MAKING SAME.

No Drawing.

collection of Letters hunt. Application ilcd Deon-bur 14, 1000. Intel No. 58 8,107.

Patented Apr. 1 2. 19 l 0.

To all whom it may concern:

llc it known that we, PAUL JULIUI Ph D., and Elmer FUBBENEGGER, Ph. D., chemists, subjects of the Em ror of Austria-Hum gal-y, residing at udwigsha fen -on-thehme, Germany, have invented new and useful Improvements in Yellow Dyes and Processes of Making Same, of which the followin is a specification.

Int e specification of Letters Patent No. 932.266 is described the production of coloring, matter by treating 3-chlor-6-nitranilin with formaldehyde, the coloring matter so produced being suitable for.use as a lnent, or lake, the color being a beautiful yellow with a gmenish tinge and being fast against the action of light, lime, water, and alcohol.

We have now discovered that b treating 4-chlor-ti-nitrnuilin with formaldehyde, a coloring matter suitable uncut, or lake, is obtained, which colorin properties generally similar to those xmacaacd by the coloring matter obtainable from ii-clxlor-B-nitranilin and formnltlehytlc, but its color is yellow with a reddish tinge. It is also very fast against H. action of light.

()ur new color-in tnatter p position corrcspon mg to the It is fairly diilicultl soluble in hot and melts at about 26 C.

a, comformula for use as a pig-- The following is an example of how our. invention can be performed, but. the invcntion is not confined to this example: lit-at together in a closed vessel. at a temporal urc of from seventy, to eighty, (lLgrLLa' (entigrade, and while stirrin three hundred and ort -five parts by weig it of a ten percent. pa'ste of 4-chlor-6-nitranilin and thirt sarts by weight of a thirt per cent. formal ehyde solution. \Vheii, row a test portion, it is seen that no diazotizable base is present, the mass is allowed to cool and the product is filtered off and washed.

Now what we claim' is:-

1. The procos of Iproducing oolorin matter by treating 4-ch or-6-nitranilin wit formaldehyde.

2. As a new. article of manufacture, the coloring matter which can be obtained by treating 4-chlor-6-nitranilin with formaldehyde which coloring matter ossesses a beautiful yellow color with a nu dish tinge, is fairly dillicultly viable in hot xylene, melts at about 262 C., and 1085198805 a comition corresponding to tie hereinbefore e aned formula C H OAQCl In twtimony whereof we have hereunto set our hands in the presence of two aubcribing witnesses.

PAUL JULIUS. ERNST FUSSENEGGER.

J. Lmm, W. W. Sonatina-a. 

